FreeCalypso > hg > freecalypso-sw

annotate target-utils/libcommon/hexarg.c @ 923:10b4bed10192

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gsm-fw/L1: fix for the DSP patch corruption bug The L1 code we got from the LoCosto fw contains a feature for DSP CPU load measurement. This feature is a LoCosto-ism, i.e., not applicable to earlier DBB chips (Calypso) with their respective earlier DSP ROMs. Most of the code dealing with that feature is conditionalized as #if (DSP >= 38), but one spot was missed, and the MCU code was writing into an API word dealing with this feature. In TCS211 this DSP API word happens to be used by the DSP code patch, hence that write was corrupting the patched DSP code.
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Mon, 19 Oct 2015 17:13:56 +0000
parents f4fc449a64ea
children
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f4fc449a64ea target-utils libcommon infrastructure for interactive commands
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1 /*
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2 * Many commands take hex arguments. This module contains the parse_hexarg()
f4fc449a64ea target-utils libcommon infrastructure for interactive commands
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3 * function, which is a wrapper around strtoul that performs some additional
f4fc449a64ea target-utils libcommon infrastructure for interactive commands
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4 * checks.
f4fc449a64ea target-utils libcommon infrastructure for interactive commands
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5 */
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6
f4fc449a64ea target-utils libcommon infrastructure for interactive commands
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7 #include <sys/types.h>
f4fc449a64ea target-utils libcommon infrastructure for interactive commands
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8 #include <ctype.h>
f4fc449a64ea target-utils libcommon infrastructure for interactive commands
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9 #include <stdlib.h>
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f4fc449a64ea target-utils libcommon infrastructure for interactive commands
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11 parse_hexarg(arg, maxdigits, valp)
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12 char *arg;
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13 int maxdigits;
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14 u_long *valp;
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15 {
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16 char *cp = arg, *bp;
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17 int len;
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18
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19 if (cp[0] == '0' && (cp[1] == 'x' || cp[1] == 'X'))
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20 cp += 2;
f4fc449a64ea target-utils libcommon infrastructure for interactive commands
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21 for (bp = cp; *cp; cp++)
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22 if (!isxdigit(*cp))
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23 return(-1);
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24 len = cp - bp;
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25 if (len < 1 || len > maxdigits)
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26 return(-1);
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27 *valp = strtoul(arg, 0, 16);
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28 return(0);
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29 }